/*************************************************************************/
/*  triangulate.h                                                        */
/*************************************************************************/
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
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#ifndef TRIANGULATE_H
#define TRIANGULATE_H

#include "math_2d.h"


/*
http://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml
*/

class Triangulate
{
public:

	// triangulate a contour/polygon, places results in STL vector
	// as series of triangles.
	static bool triangulate(const Vector< Vector2 > &contour, Vector<int> &result);

	// compute area of a contour/polygon
	static float get_area(const Vector< Vector2 > &contour);

	// decide if point Px/Py is inside triangle defined by
	// (Ax,Ay) (Bx,By) (Cx,Cy)
	static bool is_inside_triangle(float Ax, float Ay,
		      float Bx, float By,
		      float Cx, float Cy,
		      float Px, float Py);


private:
	static bool snip(const Vector<Vector2> &p_contour,int u,int v,int w,int n,int *V);

};



#endif
